Data Transfer Speed Converter
Convert between Mbps, MBps, Gbps, kbps, and other network speed units.
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How to use this calculator
- 1
Enter the data transfer speed you want to convert.
- 2
Select the unit you are converting from (e.g. Mbps).
- 3
Select the target unit (e.g. MB/s).
- 4
The result appears instantly.
Frequently asked questions
What is the difference between Mbps and MBps?
Mbps is megabits per second and MBps (or MB/s) is megabytes per second. A byte is 8 bits, so 8 Mbps equals 1 MB/s. A 100 Mbps connection therefore moves at most 12.5 MB/s. Lowercase b means bit and uppercase B means byte, and mixing them up gives an eightfold error.
How fast is a gigabit connection in MB/s?
A 1 Gbps link is 125 MB/s, since 1,000 Mbps divided by 8 is 125. A 10 Gbps link is 1,250 MB/s, and 2.5 Gbps is 312.5 MB/s. Those are line-rate maxima, and real transfers come in lower.
Does kbps mean 1,000 or 1,024 bits per second?
The converter uses decimal prefixes only: 1 kbps is 1,000 bit/s, 1 Mbps is 1,000,000 bit/s and 1 Gbps is 1,000,000,000 bit/s. Likewise 1 KB/s is 1,000 bytes per second. A tool reporting in MiB/s uses binary units instead, and 1 MiB/s is 1.048576 MB/s.
Why is my real download slower than the converted figure?
The conversion gives the theoretical rate from the advertised bits per second. Real transfers lose part of that to protocol headers, Wi-Fi conditions, server limits and congestion. A Wi-Fi link rate is a signalling speed, not the throughput you will see.
How do I estimate download time?
Divide the file size by the rate in matching units. A 1 GB (1,000 MB) file at 100 Mbps, which is 12.5 MB/s, takes about 1,000 ÷ 12.5 = 80 seconds at best. Convert the rate to MB/s first and you avoid the bit/byte slip.
Why do ISPs quote bits while browsers show bytes?
Network equipment has long measured line rates in bits per second, while file systems count in bytes. So an advertised 500 Mbps plan shows as at most 62.5 MB/s in a download dialog, and the numbers look smaller by a factor of eight without any fault.
Does the tool measure latency or data caps?
No. It converts one rate unit into another. Latency (ping time) and monthly data allowances are different quantities. For sizes rather than rates, use the data storage converter.
Data transfer rates: bits per second versus bytes per second
Eight bits to the byte
Network speeds are quoted in bits per second, file sizes and download dialogs in bytes, and a byte holds eight bits. That single factor drives the most common mistake with these units: a 100 Mbps plan peaks at 12.5 MB/s, not 100. The converter applies decimal prefixes throughout, so 1 Mbps is exactly 1,000,000 bit/s and 1 MB/s is exactly 8,000,000 bit/s.
Reference values taken from the converter
The table starts from advertised speeds in megabits per second and shows the same rate in bytes and gigabits, copied from the tool’s output.
| Mbps | MB/s | KB/s | Gbps |
|---|---|---|---|
| 1 | 0.125 | 125 | 0.001 |
| 5 | 0.625 | 625 | 0.005 |
| 10 | 1.25 | 1,250 | 0.01 |
| 25 | 3.125 | 3,125 | 0.025 |
| 50 | 6.25 | 6,250 | 0.05 |
| 100 | 12.5 | 12,500 | 0.1 |
| 500 | 62.5 | 62,500 | 0.5 |
| 1,000 | 125 | 125,000 | 1 |
Worked examples: plans and downloads
A 100 Mbps line is 12.5 MB/s, so a 1 GB file (1,000 MB) needs at least 80 seconds. Reading it the other way, a drive copying at 10 MB/s is moving 80 Mbps, and 20 MB/s is 160 Mbps. Fast links scale the same way: 2.5 Gbps is 312.5 MB/s and 10 Gbps is 1,250 MB/s. For any rate, divide Mbps by 8 for MB/s. A 4 GB movie file is 4,000 MB, so at 12.5 MB/s it needs 320 seconds of transfer, just over five minutes before any overhead.
Advertised speed versus delivered speed
The converted number is a ceiling. Protocol overhead, Wi-Fi interference, shared connections and the server at the far end all reduce what you see in practice. A wireless link rate quoted by a router describes signalling, and sustained throughput is lower. Use the conversion to compare like with like, such as a plan in Mbps against a copy speed in MB/s. When comparing providers, convert every plan to MB/s so that a 300 Mbps plan (37.5 MB/s) is judged on the same scale as a drive or a download manager.
Decimal prefixes and what is left out
Binary rates such as MiB/s are not entries, and some software reports them while labelling them MB/s: 1 MiB/s is 1.048576 MB/s. The tool also ignores latency and caps. Results display up to ten significant digits, so round as appropriate.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →